Add the runtime parameter OPT__OUTPUT_TEXT_LENGTH_INT

[ChunYen-Chen]

Resolve #401.

[hyschive]

@ChunYen-Chen I have a potentially major concern about the incompatibility between different integer types (e.g., int and long) for variadic functions like printf(). For example, IIUC, the following code is invalid in general.

int a = 3;
printf( "%ld", a );

Given that OPT__OUTPUT_TEXT_FORMAT_INT can be set rather arbitrarily (e.g., %12ld, %12d, or %12u), it seems we cannot prevent such incompatibility issues from happening.

Possible solution:

• Allow users to specify only the length of the integer output (e.g., OPT__OUTPUT_TEXT_LENGTH_INT = 12 )
• Always assume a long integer (ld) in the format specifier of printf()
• Explicitly cast integer arguments to long in function calls.

For example,

int temp = 3;
printf( "%*ld", OPT__OUTPUT_TEXT_LENGTH_INT, (long)temp );

What are your thoughts

[hyschive]

• Apply OPT__OUTPUT_TEXT_LENGTH_INT to Par_Output_TextFile.cpp

[ChunYen-Chen]

@hyschive Thanks for the review. I have updated the PR.